Improvement in machines for polishing enameled paper



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UNiTED STATES.

PATENT OFFICE.

S. SHEPHERD AND A. M. GEORGE, OF NASH/UA, NEW tlAMPSlzlflitlt".

IMPROVEMENT IN MACHINES FOR POLISHING ENAMELEDPAPER.

To all'whom it may concern:

Be it known that we, SAMUEL SHEPHERD and AMMI M. GEORGE, both of Nashua,in the county of Hillsborough and State of New Hampshire, have inventedcertain new and useful Improvements in Machines for Polishing EnameledPaper; and we do hereby de clare that the following is a full, clear,and exact description of the same, reference being had to theaccompanying drawings, making a part of this specification, in which-Figure 1 is a plan or top view. Fig. 2 is an end elevation. Fig. 3 is acentral vertical longitudinal section.

Similar letters of reference indicate corresponding parts inv all thefigures.

This invention consists in the combination of a burnishing-rollerrevolving at any required velocity with a suitable supporting-table, andwith an endless carrying-apron movingv at a' lower velocity than theburnishing-roller, in such manner that the paper being carriedunderneath the burnishin g-roller h as its enameled A surface subjectedto the frictional rubbing action of the said roller, whereby it ispolished or burnished much more rapidly and efciently than by the meansordinarily employed.

The invention also consists in certain novel means of insuring` theproper position of the paper during its passage to the burnishingrollerand of preventing the formation of ridges or creases therein during theoperation of polishing the same.

The invention further consists in a novel means of securing an efficientbearing of the \burnishingroller upon the paper during the polishingoperation.

To enable others to understand the construction and operation of ourinvention, we will proceed to describe it with reference to thedrawings.

A is the .frame which supports the working parts of the machine, and onthe upper side or top of which is secured the flat horizontal table B,which occupies the entire central part of the aforesaid top of the frameA. At the rearmost end of this table B, with the ends of its shaft a,working in suitable bearings in the sides of the frame A, is atransverse roller, G, upon one end of the shaft of which is xed a pulleyor belt-wheel, j, while situated at the opposite or front end of thesaidtablel is a similar transverse roller, D, which has the ends of itsshaft I) workingin sliding journatboxes,

`which are placed in suitable longitudinal slots Ior recesses c, formedone in each side of the fframe A, at the front end thereof.

j E is a transverse bar situated behind the `roller D, and the ends ofwhich project outward through the aforesaid slots c, as shown at d inFig. 1. c are two knobs or brackets tsituated at the front end of theframe A, one `ateach side thereof. A horizontal screw, j', .passesthrough a suitable hole'in each of the brackets c, and back through theoutwardlyprojecting ends d ofthe transverse bar E, and, inasmuch as theends of the transverse bars E are situated behind the sliding bearingsof the roller D, it follows that by turning the `screw j', so as tobring' the transverse bar E forward or outward, the aforesaid slidingbearings, and consequently the roller D, will be brought forward, Whileby turning the said screws in a contrary direction the bar E, andconsequently the roller D, will be allowed to move inward toward thetable B.

Placed upon the rollers C D, and with its upper part resting upon andsupported by the table B, is an endless apron, F, which is made ot'indiarubber, felt, velvet, or other elastic material, and the tension ofwhich is adjusted by means of the screws f and bar E, as justhereinbefore explained.

G represents the burnishing-roller, which may be made of iron with achilled surface, or of steel, and which is situated transversely nearone end of the table B, over the said table, and, of course, above theuppermost surface of the endless apron F. The ends of the shaft g of theburnishing-roller G work in yielding and adjustable journal boxes orbearings H, which are situated one at each side of the frame A. Avertical quadrangular stem, h, projects downward from the center of eachbearing H into a suitable vertical slot in the side ofthe frame A, andserves to steady the bearing. Passing through each end of each bearing,and with its lower extremity resting upon the uppersurface of the sideof the frame A, is a hollow screw, e', while passing down through eachhollow screw t', with its lower end screwed into the frameA, is a solidscrew, 7c, while placed around each of the screws 7c, between the headthereof' and the top of the hollow screw through which it passes, is aspiral spring, n. The appurtenances of the bearings H being thusarranged, the height of the burnishing-roller with reference to theupper surface of the endless belt F may be adjusted by turning thehollow screws i, while the downward pressure of the springs n, to pressthe said roller upon the upper surface ofthe paper as it is carriedunderneath it by the endless apron F, may be adjusted by turning thescrews 7c. The length of the burnishing-roller G is less than thedistance between the bearings H, in order that suflcient room may beallowed for the reciprocating 'movement of the said roller, as will bepresently further explained. One end of the shaft g of thebnrnishing-roller projects outward beyond its bearing, and has fixedupon it a pulley, I, and formed around the said end of the shaft g, atthe inner end ofthe pulley I, is an annular groove, i'.

J is a transverse shaft which is situated in the front or forward end ofthe frame A, land which is furnished at one end with a drivingpulley, K,and also with a small pulley, m, and at the other with a pulley, L,which is connected by a belt, s, with the pulley I of thelmrnishing-roller G, while a band, t, extends from they small pulley mto the pulley J on the rearmost roller, O. Situated in the center 0f theshaft J is a small band-wheel, M, which is connected by a belt, u, witha larger bandwheel, N, which is fixed in the center of a transverseshaft, R, situated in the rearmost end of the fra-me A, at thelower partthereof. One end of this shaft B projects out beyond the side of theframe A, and has fixed upon it a thick wheel or disk, W, in and aroundthe circumference of which is a cam-groove, w.

S is a lever, which is pivoted at or near its center upon a pin, a',which projects out from the side of the frame A. The upper end of thislever S is forked and fitted into the groove r in the shaft of theburnishing-roller G, while the lower end, being also forked, is fittedinto the camgroove w in the circumference of the wheel W in such mannerthat the rotation of kVt-he said wheel 7, by vibrating the lever S,

communicates a longitudinal reciprocating movement to theburnishiiig-roller G.

T is an elastic pressing plate or blade, which is placed transverselyover the endless apron F, in front of the roller G, and in an inclinedposition, as shown more clearly in Fig. 3. Projecting forward from eachend of this pressing-plate T is a dat arm, b', the forward extremity ofwhich rests upon a stud or spur, c', while near the inner end thereof isa hole, thronghwhich is passed a fixed vertical screw, d. Between theheads of these 'screws el and the upper sides of the arms b are spiralsprin gs c', which press the rear or'lower edge Qf the pressing-plate Tdown upon the paper as it passes to the burnishing-roller, as will bepresently further set forth. A small roller may be attached lengthwiseto therear or pressing edge of this pressing-plate, if desired, todiminish its friction upon the paper.

Instead of making the endless apron F elastic, as set forth, the saidapron may be made of non-elastic material, and the upper surface of thetable B may be made elastic, whereby a proper bearing of theburnishingroller G upon the surface of the paper is obtained in the samemanner as when the apron is itself elastic. Iiurthermore, the saidburnishing-roller may be rotated, if desired, in a direction opposite tothe movement of the endless apron F with the same result as when movingin the same direction-as the said apron.

The paper, iu the form of long sheets or pieces, is placed with itsenameled surface upward upon the forward portion of the endless apron F,and is carried back, rst, under the pressing-plate T, which spreads itAout evenly upon the said apron, and then under the burnishing-roller Gwhich, being pressed down upon the paper by the springs n, and revolvingat a mulch higher velocity than that of the paper as it is carried backby the apron F, polishes or burnishes the upper and enameled surfacethereof by the friction of its rapidlymoving surface upon the saidenameled surface of the paper. The elastic nature of the endless apron Fcauses the paper to bend somewhat around the under side of thebnrnishing-roller G, as it passes underneath the saine, and thus keepsit in contact with a much greater proportion of the surface of the saidroller than if the paper were kept perfectly dat and straight whilepassing under the same, whereby a more efficient action of the saidroller upon the paper is obtained. At the same time the reciprocatingmovement of the lmrnishing-roller, produced simultaneously with itsrotary motion by means of the cam- `wheel W and lever S, as hereinbeforeexplained, prevents the formation of ridges or creases in the paper,which would be likely to occur if such reciprocating movement of theroller were dispensed with.

What we claim as new, and desire to secure by Letters Patent, isi l. Thecombination of the metallic burnishing-roller G, endless apron F, andtable B, when the bnrnishing-roller revolves ata higher velocity thanthat of the endless apron, substantially as herein set forth, for thepurpose specified.

2. Providing an elastic bearing for the paper under theburnishing-roller by making either the apron or the table elastic,substantially as herein set fort-h.

3. Giving` the burnishing-roller G a reciprocating movement transverselyto the endless apron simultaneously with its rotary motion,substantially as herein set forth, for the purpose specied.

4. The pressing-plate-T, applied, in relation with the burnishing-rollerG, endless apron F, and table B, substantially as herein set forth, forthepurpose specified.

SAMUEL SHEPHERD. A. M. GEORGE.

NVitnesses B. F. GEORGE, W. W. BAILEY.

